CN116604019A - High-efficiency extrusion preparation method of high-temperature-resistant aluminum-based composite material - Google Patents
High-efficiency extrusion preparation method of high-temperature-resistant aluminum-based composite material Download PDFInfo
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- CN116604019A CN116604019A CN202310507463.6A CN202310507463A CN116604019A CN 116604019 A CN116604019 A CN 116604019A CN 202310507463 A CN202310507463 A CN 202310507463A CN 116604019 A CN116604019 A CN 116604019A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 57
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000011812 mixed powder Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 7
- 238000007731 hot pressing Methods 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims description 35
- 239000002245 particle Substances 0.000 claims description 30
- 238000000465 moulding Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 13
- 238000004663 powder metallurgy Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 238000009694 cold isostatic pressing Methods 0.000 claims description 4
- 238000001513 hot isostatic pressing Methods 0.000 claims description 4
- 238000010884 ion-beam technique Methods 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000010936 titanium Substances 0.000 description 11
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 4
- 238000001192 hot extrusion Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a high-efficiency extrusion preparation method of a high-temperature-resistant aluminum-based composite material, and belongs to the technical field of aluminum-based composite materials. The method comprises the following steps: (1) By reacting TiO 2 Performing hot pressing twice on the mixed powder with Al to prepare a powder with low strength at one endTiO 2 /Al, the other end is high strength (Al 2 O 3 +Al 3 A Ti/Al ingot; (2) Taking one end with low strength as an extrusion dummy ingot in front, and finishing extrusion to obtain a profile; (3) High temperature treatment of the extruded profile to obtain a high temperature resistant (Al) product with uniform composition and properties 2 O 3 +Al 3 Ti/Al composite material. The scheme can prepare high-strength high-temperature-resistant composite materials, can obtain required sectional materials through extrusion, can avoid post machining, effectively improves the material utilization rate and reduces the preparation cost.
Description
Technical Field
The invention relates to the technical field of aluminum-based composite materials, in particular to a high-efficiency extrusion preparation method of a high-temperature-resistant aluminum-based composite material.
Background
The conventional high-strength aluminum alloy generally has the service temperature below 100 ℃, the strength of the conventional high-strength aluminum alloy is rapidly deteriorated when the service temperature exceeds 200 ℃, and the conventional high-temperature-resistant aluminum alloy 2A16, ZL205 and the like have the instantaneous tensile strength of only about 100MPa at 300 ℃. Therefore, at a temperature higher than 250 ℃, the structural member is generally manufactured using a material such as titanium alloy or stainless steel, and it is difficult to achieve a lightweight structural design.
The aluminum-based composite material using ceramic particles as the reinforcing phase can have very excellent high-temperature thermal stability. Wherein Al is 2 O 3 The particles have good compatibility with aluminum matrix and excellent stability at high temperature. However, conventional externally applied methods introduce Al 2 O 3 The aluminum alloy has a difficult bit relation with an aluminum matrix, the enhancement efficiency is low, and the plasticity of the material is seriously damaged by adding a large amount of the aluminum alloy. Addition of TiO to aluminum matrix 2 The particles, which are reacted in situ during the hot pressing, form (Al 2 O 3 +Al 3 Ti/Al, the material may have extremely high temperature strength (document "Design, microstructure and high temperature properties of in-site Al) 3 Ti and nano-Al 2 O 3 reinforced 2024Al matrix composites from Al-TiO 2 system ": journal of Alloys and Compounds,2019, 775:290). However, the material has high-temperature strength and difficult deformation, so that the extrusion deformation is difficult to obtain the profile and the performance is further improved. The 201611079376.1 patent provides a method for preparing and extruding a high volume fraction composite material, but the method uses other easily deformable materials as dummy ingot, and the surface of the extruded material is coated with a layerLow strength materials require additional machining to remove them, resulting in low material utilization and increased material manufacturing costs.
Based on the background, the patent provides a high-efficiency preparation and extrusion method of a high-temperature resistant aluminum-based composite material which has high-temperature mechanical property and deformability and does not need post machining.
Disclosure of Invention
The invention aims to provide a high-efficiency extrusion preparation method of a high-temperature resistant aluminum-based composite material, which uses aluminum powder and TiO 2 The particles are used as raw materials, a material billet with soft front end and hard rear end is formed through a twice sintering process, then the front end low-strength material is used as an extrusion dummy ingot to complete extrusion deformation, and finally the high-temperature treatment is used for enabling the low-strength material outside the extrusion material to complete in-situ reaction, so that the uniformity of the components and mechanical properties of the whole material is realized.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a high-efficiency extrusion preparation method of a high-temperature resistant aluminum-based composite material comprises the following steps:
(1) Aluminum powder and TiO 2 Blending the particles to obtain mixed powder, and carrying out cold press forming on part of the mixed powder to obtain a pressed compact I;
(2) Carrying out high-temperature powder metallurgy sintering on the pressed compact I obtained after the pressing molding in the step (1) to obtain a compact I;
(3) Placing the rest part of the mixed powder in the step (1) and the billet I obtained after sintering in the step (2) into the same die, placing the powder at one end of the billet I, and performing cold press molding again to obtain a pressed compact II;
(4) Carrying out low-temperature powder metallurgy sintering on the pressed compact II obtained after the pressing molding in the step (3) to obtain a compact ingot II;
(5) Extruding the billet II obtained in the step (4) to obtain an extruded sample; the front end of the billet II is made of low-strength material (the part corresponding to the second powder filling) and the rear end of the billet II is made of high-strength material (the part corresponding to the billet I), in the extrusion process, one end of the billet II filled with the powder is in front (contacted with an extrusion die), the extrusion ratio is 5:1-25:1, and the material obtained by sintering the front end at low temperature in the extrusion process can be used as an extrusion dummy ingot and flows and coats the surface of the extruded material in the backward extrusion direction;
(6) And (3) carrying out high-temperature treatment on the extruded sample obtained in the step (5) to obtain the high-temperature-resistant aluminum-based composite material with uniform components.
In the step (1), the average particle diameter of the aluminum powder is 0.1-200 μm, and TiO 2 The average particle diameter of the particles is 0.01-100 mu m, and the blending mode is mechanical mixing or ball milling mixing; tiO in the mixed powder obtained after blending 2 The content of the particles is 3-25wt%.
In the step (1), the pressed powder accounts for 60-90% of the total powder mass, and the density after cold pressing is 60-80%.
In the step (2), the high-temperature powder metallurgy sintering adopts a vacuum hot-pressing sintering, cold isostatic pressing, hot isostatic pressing or discharge ion beam sintering process under the atmosphere or vacuum condition, and the sintering temperature in the high-temperature powder metallurgy sintering is 605-655 ℃.
In the step (3), the density of the newly-packed powder after cold press molding reaches 40-60%.
In the step (4), the low-temperature powder metallurgy sintering adopts a vacuum hot-pressing sintering, cold isostatic pressing, hot isostatic pressing or spark ion beam sintering process under the atmosphere or vacuum condition, and the sintering temperature in the low-temperature powder metallurgy sintering is 550-600 ℃.
In the step (5), the extrusion temperature is 300-500 ℃.
In the step (6), the high-temperature treatment temperature is 600-630 ℃ and the time is 2-12 hours.
(Al of the invention) 2 O 3 +Al 3 The preparation and extrusion method of the Ti/Al high-temperature resistant aluminum-based composite material have the following advantages and beneficial effects:
1. compared with the traditional high-temperature aluminum alloy, the aluminum-based composite material prepared by the invention has higher high-temperature strength and thermal stability.
2. Al prepared by external addition 2 O 3 In-situ introduced Al of the present invention 2 O 3 +Al 3 Ti has a higher reinforcing efficiency and is excellent in the strength,therefore, the content of the reinforcing phase can be reduced, and the plasticity of the material can be improved.
3. Directly with one-step hot pressing (Al 2 O 3 +Al 3 Compared with Ti/Al, the invention has low strength of TiO due to the extrusion front end 2 Al, which can act as extrusion dummy ingot, the material is easier to flow, tiO 2 Al is formed in a mold with a hard-to-deform (Al 2 O 3 +Al 3 The Ti/Al lubrication function is achieved, the tensile stress generated by friction between the surface of the blank and the die is reduced, and the alloy is made of (Al) 2 O 3 +Al 3 Ti/Al is placed in a three-way compressive stress state so that the Ti/Al is easier to plastically deform.
4. Compared with the method of adding dummy ingot to the front end of the billet by welding and the like at the later stage, the invention can directly convert the external low-strength material into high-strength (Al) by utilizing the high-temperature treatment at the later stage 2 O 3 +Al 3 Ti/Al, thereby making the material utilization close to 100% and eliminating the high machining cost.
5. The aluminum-based composite material prepared by the invention has excellent high-temperature mechanical properties, and can be extruded to obtain a final section. Therefore, the material has both mechanical property and deformability, has high material utilization rate, and can avoid machining cost so as to realize large-scale industrial preparation and application.
Drawings
FIG. 1 is a schematic illustration of the hot extrusion process of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
In the following examples, a billet ii was hot extruded to obtain an extrusion sample, the front end of the extrusion sample was made of a low-strength material (the portion corresponding to the second powder charge) and the rear end was made of a high-strength material (the portion corresponding to the billet i), the powder charged for the second time was in the front end (contact with the extrusion die) during the extrusion process, the billet i was in the rear end (contact with the extrusion rod), and the material obtained by low-temperature sintering of the front end during the extrusion process was used as an extrusion dummy ingot and was flow-coated on the surface of the extrusion-obtained material in a direction opposite to the extrusion direction.
Example 1:
the embodiment is a high-efficiency preparation method of a high-temperature resistant aluminum-based composite material, the preparation process is shown in figure 1, and the preparation method specifically comprises the following steps:
spherical aluminum powder with average particle diameter of 10 μm and TiO with average particle diameter of 0.04 μm are selected 2 The particles are mixed by a high-energy ball mill, and TiO in the obtained mixed powder 2 The particles were 6wt%. Taking out 90% of the mixed powder, cold-pressing and molding at 200MPa, putting into a vacuum furnace at 620 ℃ for sintering for 2 hours to obtain a billet I, opening one end of a mold after cooling, loading the rest 10% of the mixed powder, cold-pressing and molding again, and putting into the vacuum furnace at 580 ℃ for sintering to obtain a billet II. The sintered billet II is subjected to hot extrusion molding at 450 ℃, the extrusion ratio is 16:1, and one end filled with 10% of powder is in front after extrusion. The extruded material is treated for 8 hours at 610 ℃ to obtain the final aluminum-based composite material.
The composition (Al) produced in this example 2 O 3 +Al 3 The Ti/Al extruded section can realize uniformity and consistency of components and mechanical properties without machining; the strength of the extruded section is 246MPa at 350 ℃, and the strength attenuation is below 5% after the extruded section is insulated for 2000 hours at 350 ℃.
Comparative example 1
Spherical aluminum powder with an average particle diameter of 10 μm and TiO with an average particle diameter of 0.04 μm are selected 2 The particles are mixed by a high-energy ball mill, and TiO in the obtained mixed powder 2 The particle content was 6wt%. All the mixed powder is formed by cold pressing under 200MPa and is put into a vacuum furnace for sintering for 2 hours at 620 ℃. The sintered billet is hot extruded at 450 ℃ with an extrusion ratio of 16:1, and the material is found to be cracked in the extrusion process, so that the required profile cannot be obtained.
Comparative example 2
Spherical aluminum powder with an average particle diameter of 10 μm and TiO with an average particle diameter of 0.04 μm are selected 2 The particles are mixed by a high-energy ball mill, and TiO in the obtained mixed powder 2 The particle content was 6wt%. Cold-pressing the mixed powder at 200MPa, and sintering in a vacuum furnace at 620 ℃ for 2 hours. And welding a 6060 aluminum alloy pad at the front end of the sintered billet to serve as an extrusion dummy ingot, and performing hot extrusion at the temperature of 450 ℃ with the extrusion ratio of 16:1.
The surface of the obtained material is provided with a layer of 6061 aluminum alloy, and the components and mechanical properties are uneven and need to be removed through mechanical processing, so that the material utilization rate is low, the preparation process is complex and the cost is high.
Example 2
Spherical aluminum powder with an average particle diameter of 10 mu m and TiO with an average particle diameter of 2 mu m are selected 2 The particles are mixed by a high-energy ball mill, and TiO in the obtained mixed powder 2 The particle content was 20wt%. Taking 80% of mixed powder, cold-pressing and molding at 200MPa, placing into a vacuum furnace at 620 ℃ for sintering for 2 hours, opening one end of a mold after cooling, loading the rest 20% of mixed powder, cold-pressing and molding again, and placing into the vacuum furnace for sintering at 580 ℃. The sintered billet is hot extruded at 450 ℃ with an extrusion ratio of 16:1, and the end filled with 20% of powder is in front after extrusion. The extruded material was treated at 620 ℃ for 10 hours to obtain the final material.
With the present example, (Al) 2 O 3 +Al 3 The Ti/Al extruded section can realize uniformity and consistency of components and mechanical properties without machining. The strength of the extruded section is 290MPa at 350 ℃ and the strength attenuation is below 5% after the extruded section is insulated for more than 2000 hours at 350 ℃.
The present invention has been described in terms of the foregoing embodiments, but the embodiments are merely to further illustrate the features and advantages of the invention, and are not to be construed as limiting the claims of the invention.
Claims (9)
1. A high-efficiency extrusion preparation method of a high-temperature resistant aluminum-based composite material is characterized by comprising the following steps of: the high-efficiency extrusion preparation method comprises the following steps:
(1) Aluminum powder and TiO 2 Blending the particles to obtain mixed powder, and carrying out cold press forming on part of the mixed powder to obtain a pressed compact I;
(2) Carrying out high-temperature powder metallurgy sintering on the pressed compact I obtained after the pressing molding in the step (1) to obtain a compact I;
(3) Placing the rest part of the mixed powder in the step (1) and the billet I obtained after sintering in the step (2) into the same die, placing the powder at one end of the billet I, and performing cold press molding again to obtain a pressed compact II;
(4) Carrying out low-temperature powder metallurgy sintering on the pressed compact II obtained after the pressing molding in the step (3) to obtain a compact ingot II;
(5) Extruding the billet II obtained in the step (4) to obtain an extruded sample; the front end of the billet II is made of low-strength material (the part corresponding to the powder filled for the second time), and the rear end of the billet II is made of high-strength material (the part corresponding to the billet I);
(6) And (3) carrying out high-temperature treatment on the extruded sample obtained in the step (5) to obtain the high-temperature-resistant aluminum-based composite material with uniform components.
2. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (1), the average particle diameter of the aluminum powder is 0.1-200 mu m, and TiO 2 The average particle diameter of the particles is 0.01-100 mu m, and the blending mode is mechanical mixing or ball milling mixing; tiO in the mixed powder obtained after blending 2 The content of the particles is 3-25wt%.
3. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (1), the pressed powder accounts for 60-90% of the total mass of the powder, and the density after cold pressing is 60-80%.
4. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (2), the high-temperature powder metallurgy sintering adopts a vacuum hot-pressing sintering, cold isostatic pressing, hot isostatic pressing or spark ion beam sintering process under the atmosphere or vacuum condition, and the sintering temperature in the high-temperature powder metallurgy sintering is 605-655 ℃.
5. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (3), the density of the newly-packed powder after cold pressing molding reaches 40-60%.
6. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (4), the low-temperature powder metallurgy sintering adopts a vacuum hot-pressing sintering, cold isostatic pressing, hot isostatic pressing or discharge ion beam sintering process under the atmosphere or vacuum condition, and the sintering temperature in the low-temperature powder metallurgy sintering is 550-600 ℃.
7. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (5), the extrusion temperature is 300-500 ℃.
8. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the extrusion process of the step (5), one end filled with the powder for the second time is in front of (contacted with an extrusion die), the extrusion ratio is 5:1-25:1, and a material obtained by sintering the front end at low temperature in the extrusion process can be used as an extrusion dummy ingot and flows and coats the surface of the extruded material in the backward extrusion direction.
9. The high-efficiency extrusion preparation method of the high-temperature resistant aluminum-based composite material according to claim 1, which is characterized by comprising the following steps: in the step (6), the high temperature treatment temperature is 600-630 ℃ and the time is 2-12 hours.
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| CN202310507463.6A CN116604019A (en) | 2023-05-08 | 2023-05-08 | High-efficiency extrusion preparation method of high-temperature-resistant aluminum-based composite material |
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| CN202310507463.6A CN116604019A (en) | 2023-05-08 | 2023-05-08 | High-efficiency extrusion preparation method of high-temperature-resistant aluminum-based composite material |
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